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y@F.Iafvr. METALLIC ROOPING PLATE.

lvm-296,610.

Patented Apr. 8, 1884.

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SPECIFICATION forming part of Letters Patent No. 296,610, dated April 8, 1884.

Application filed December 28, 1883. (No model.)

ton, inthe District of Columbia, haveinvented a new and useful Improvement in Metallic Roofing-Plates, of which the following is a specification.

My invention refers to the construction of metallic plates for rooing, whereby separate plates of any suitable dimensions are united in overlapping tiers by certain lateral and transverse connections, hereinafter to be described, which, while admitting of the expansion and contraction d ue to the material, secure] y attach the plates to each other and to the roof-sheathing in anianner which effectually prevents leakage and favors ventilation.

In the accompanying drawings, which form part of this specification, Figure 1 is a pla-n View, showing two plates of the lower tier and one of the second tier. tion on line c: v of Fig. l. Fig. 3 is a vertical section on line y y of Fig. l. Fig. 4is a transverse section of the two lower plates, showing longitudinal joint and position of upper plate. Fig. 5 is an edge view of pla-te, showing position or' pendent anges. Fig. Gis atransverse section on line o c, showing upturned lianges. Fig. 7 is a transverse section of plates in adjacent tiers, showingl chamber betweenl on enlarged scale. Fig. 8 is a side view of fastener on enlarged scale. Fig. 9 is a top view of same. Fig. l() is a face view of same.

The saine letters of reference denote thesame part in all the figures.

.Each plate P P has upon one side a single corrugation, c, and an upturned flange, f, in-v clining in opposite directions and separated by a valley, a. Upon the other side are two corrugaiions, a and b, similarly inclined, with a valley, c, between them, so that the double corrugation of one plate will tit upon the single corrugation and flange of the adjacent plate and form a. water-tight joint, the opposite inclination of the corrugation e and ilange f serving`to confine the double corrugation of the other plate thereto. .p

In the lower portion of the plate P is the upwardprojecting hood F5, extending the overlapping distance of the tiers, designed to embrace and cover the upper portion of the Fig. 2 is a vertical seclateral joint, being secured thereon and thereto by the fastener B, which serves to attach the lower plates to the sheathing, close the joint-valley, and hold the upper plate, P', upon the plates P beneath.

On each side of the hood R the lower edge of the plate is formed with pendent triangular flanges m, deepest at the recess or hood, and terminating at the lat-eral corrugations c and b, as shown in Fig. 5. The upper edge of the plate has similar triangular flangeaextending upward, highest at the corrugation, and terminating near the middle of the plate, as seen at i' i", Fig. 6.

Above the hood R is an upward-projecting chamber, C, of circular or other suitable form,- and of such dimensions as to occupy the middle of the plate, serving to stiften the plate, in addition to constituting an air-chamber.

To cover a roof with these plates; the rst plate of the lower tier at the right is attached by bending down the double corrugation and nailing to the edge of the roof-sheathing, and secured at the left by nails through the perforations c in the valley a. The double corrugations a b of the adjacent plate are then passed over the corrugation c and flange f of the first plate, forming the joint between the plates, the second plate, l?, being secured by nailing through the opcnin o in the valley n, and so throughout the entire lower tier' of plates. The securers B are then placed in each valley by nailing through the openings o of the arms d and perforations t' in the platevalleys. The bar cl presses upon the double thickness of plate in the valley, the plate p closing the valley, and the arm s projecting in direction of the top of the plate. The hood R of a plate, P', of the second tier covers the portion of the joint of the plates l? below as far as the trapezoidal plate p, whose top is beneath the lower edge of said hood when in position under the arm s, as shown in Fig. 2. The hood R is of such depth that when drawn down by the securer B the lower edges of the anges m will reach the surface of the plates beneath, the effect of the securer B being to hold the superposed plate rmly upon those below, while the plate p blocks the Valley of the joint. In giving the upper plate this position its double corrugation engages the cor- IOO rugation and flange of the adjacent plate on the right, securing that side in position, the other side of the plate P being attached to the sheathing by nailing through the perforations v, as described for the lower tier. The pendent flanges m are thus drawn closely upon the plates below, as shown in Fig. 4, forming a square lower edge to the upper plate, P.- The upturned flanges r r at the top `of the lower plate press against the lower surface of the plate P and interpose abarrier to the upward passage of water, the two sets of flanges and the surfaces of the plates adjacent to them forming the Wedgeshaped anti-capillary ventilating-chambers shown in Fig. 7. Moreover, the slight inclination thus given the plate P adjacent to the hood R serves to throw the water over to the sides of the plate,where leakage cannot occur. The spring caused by the side fastening of the plate and the triangular flanges at its ends adds materially to thestift ness of the attachment to the roof.

By the construction hereinbefore described the plates are firmly secured to the sheathing and to each other in a manner which readily admits of contraction and expansion, while both transverse and lateral joints are formed, so as to be non-leaking. Instead of forming the single corrugation and flange on the left side of the plate, they may be placed on th'e opposite side, in whichv case the laying of the plates will begin at the lower left-hand corner of the roof. Moreover, the flange and all the corrugations may be formed perpendicular to the face of the plate, and after the corrugations of the second plate embrace the corrugation and flange of the first the opposite inclination may be given to both seis at the same time by a suitable tool, thus forming the joint, as above set forth.

Y Having described my invention and the operation thereof, what I claim as new and of my own invention, and desire to ysecure by Letters Patent, is-

1. The construction of a metallic roongplate with an oppositely-inclined double corrugation on one side and a similarly-inclined corrugation and flange on the other side, with valleys between them, substantially as set forth, for forming the lateral joints between adjacent plates.

2. The hood It, in combination with the sccurer B, substantially as described, whereby the upper tier of plates is firmly attached to those beneath and the joint-valleys closed.

3. In combination with the hood R and the securer B, the pendent triangular flanges m, for forming the transverse j oint,substantially as described.

4. The combination of the upturned triangular flanges r r', pendent triangular flanges m, and securer B with'the lateral joints, substantially as and for the purposes set forth.

5. The combination of the chamber Gand hood B with the two sets of triangular flanges and the pl ate-surfaces, 'substantially as and for the purposes set forth.

GEORGE PATTEN.

Witnesses:

JOHN F. C. CLARK, V. FORD. 

